Sugar-refining apparatus.



No. 705,869. Patented luly 29, I902.

J. ROBIN-LANGLOI S.

SUGAR REFINING APPARATUS.

(Application filed. June 25, 1901.)

(No Model.)

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WITNESSES aj zuhz A 4 HI 6 ATTORNEYS NITED STATES JOSEPH ROBIN-LANGLOIS, OF PARIS, FRANCE.

SUGAR-REFINING APPARATUS.

' SPECIFICATION forming part of Letters Patent No. 705,869, dated July 29, 1902.

Application filed June 25,1901. Serial I10. 65,977. (No model.)

T on whom it may concern:

Be it known that I, J OSEPH ROBIN-LANG- LOIs, a citizen of the'Republic ofFrance, and a resident of Paris, France, have'invented Improvements in Sugar-Refining Apparatus,

of which the following is a specification.

The object of my invention is to construct an apparatus whereby'to obtain in a rapid and economicalway the maximum yield of IO pure white or refined sugar from sugars of ment and the treating'liquid or syrup are.

caused to pass or travel down through the sets of apparatus together, but oppositely from one set to another, in such a manner that the sugarunder treatment as it passes through the successive sets of apparatus will be subjected to the action of a dissolving liquid, becoming more and more pure or less and less dense. To accomplish this object, the sugar is placed in a melting-pan, melted, and then passed to a cooler, where it is crystallized. From there'it is passed to a centrifugal and purged, the syrup and sugar being independently collected. The sugar is then taken to a second melting-pan and again dissolved, recrystallized in a second cooler, and repurged in a second centrifugal, and so on until the purged .product from the last centrifugal is a white sugar.

The view in the accompanying drawing is a diagram of the apparatus, partly in' sec-' tion.

In this apparatus there are successive sets of batteries, each composed of one or several 40 melting-pans or heaters A, (A A in which the sugar isdissolved, one or more mixing: coolers B (B B underneath the heaters, and one or more centrifugal separators O (C 0 underneath the coolers. There is also a preliminary set composed of a heater A, a cooler B below'it, and a centrifugal 0 .below the cooler. Each melting-pan or heater is provided with a suitable valved outlet at its bottom to permit its contents when properly dissolved to be let into the cooler B (B, &c.,) be

low it at the proper time for cooling and crystallization, and in like manner each cooler cated by the dotted arrows.

has a suitable valved outlet at its bottom to permit its more or less partially-crystallized contents to be discharged into the centrifugal below to have the syrup there separated from the sugar. Means are provided for conveying the syrup from each centrifugal C (O C) of the second, third, and'fourth set or battery to the melting-pan or heater A (A A) of the immediately-preceding set, as by means of a pipe 6 (e c.) This syrup is to aid in dissolving and purifying the sugar supplied to the heaters or melting-pans. To force the syrup up through the pipes, suitable pumps, as 19 19 b, may be provided, taking the syrup from vessels, such as D D? D, which receive the syrup from the outlet-spouts'c c c of the corresponding centrifugals. On the other hand, some conveylng meansfor example, endless -belt con- -veyers F F F are provided to carry the separated sugar from eachof the first three centrifugals up into the melting-pan A (A A of the next succeeding battery. Each conveyer receives the sugar from a troughf, (ffi) into which it is delivered from the corresponding centrifugal. In this way it will be seen that the sugar is caused to travel through the successive batteries from the first battery to the lastleft to right in the drawing-as indicated by the full-line arrows, while the syrup is caused to travelthrough the same successive batteries, but from last to first, as indi Pure water is supplied to the meltingfpan A of the last battery througha pipe a for example, and as it travels through the successive batteries toward the first it gets to be a thicker and denser syrup, until finally it is discharged as molasses at the outlet 0 from the first centrifugal G. On the other hand, as the sugar travels through the successive batteries from the first to the last it meets a dissolving and purifying liquid which is purer and purer as the sugar progresses from one battery to another in its travel. Sugar which reaches the melting-pan A of the last battery from the centrifugal C has already been more or less refined by treatment in the preceding batteries, and it therefore arrives at the last meltingpau almost white, to be there treated by pure water, so that when delivered at f from the last centrifugal the refining is complete and pure white sugar is obtained. The heaters I successive batteries from the last toward the or melting-pans may be heated in any wellfirst, and to cause the sugar to travel through known way, as by steam-coils S. the same batteries but from the first toward I claim as my inventionthe last, as and for the purpose described. I 5 5 The herein-described sugar-refining appa- In testimony whereof I have signed my ratus, consisting of a series of successive batname to this specification in the presence of teries of melting-pans, coolers and centriftwo subscribing Witnesses.

ugals so located that the sugar passes from JOSEPH ROBIN-LANGLOIS. pan to cooler and then to the centrifugahwith Witnesses: 10 means connecting the successive batteries to LEON FRANGKEN,

cause dissolving liquid to travel through the I EDWARD P. MACLEAN. 

